On 3/23/12 11:32 AM, Worley, Dale R (Dale) wrote:
>> From: Alexey Entsov [[email protected]]
>>
>> The question is: What should be the "o=" line of each SDP Answer? Should it
>> be unique for each dialog?
>
> As far as I can tell, in general it does not matter what the o= line
> values are, as long as the uniqueness rule is followed: If two SDP
> instances have exactly the same o= lines, then the SDP instances
> must be exactly the same.
The requirement to be identical must only apply among SDP instances that
are related. If two different UAs, in separate dialogs, just *happen* to
create otherwise identical SDP instances there certainly cannot be a
requirement that the o= values be identical.
Presumably the same is true if its the *same* UA, but in different dialogs.
And that can probably be generalized so the requirement only applies if
the *intent* is that the recipient recognize them as identical. (This is
arguable.)
Thanks,
Paul
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